I want to use kotlin for UDP communication.

import java.net.*

funmain(args:Array<String>){
    valsocket=DatagramSocket()
    socket.connect(Inet4Address.getByName("192.168.0.132"),123)

    valdata=ByteArray(128)
    val header=(0shl30) or (4shl27) or (3shl24) or (15shl16) or (4shl8)
    data[0] = (header shr24).toByte()
    data[1] = (header shr16).toByte()
    data[2] = (header shr8).toByte()
    data[3] = (header shr0).toByte()

    valpkt = DatagramPacket (data, 4*12)
    socket.send(pkt)

    pkt.length=data.size
    socket.receive(pkt)

    System.out.println(data.copyOf(pkt.length).joinToString(
            separator=",
            transform={b->String.format("%02x",b)}
    ))
}